Why do the bones in arms need to perform well under compression and tension?

Think about what you do with your arms. Can you hang from a bar? Your arms are working in tension there. Can you lift a weight above your head? Then your arms are working in compression. They have to do both pretty well.

Bones In The Arm

Bones Of Arm

Having a trained dog isn’t the same as having a balanced dog, but if your dog knows a few basic commands, it can be helpful when tackling problem behaviors — existing ones or those that may develop in the future. Learn here https://tr.im/BNwiW

So where do you start with dog obedience training? You could take a class, but it’s not necessary; you can do it yourself. In fact, with the right attitude, it can be fun for both you and your dog!
Step 1 : Sit
This is one of the easiest dog obedience commands to teach, so it’s a good one to start with.
• Hold a treat close to your dog’s nose.
• Move your hand up, allowing his head to follow the treat and causing his bottom to lower.
• Once he’s in sitting position, say “Sit,” give him the treat, and share affection.
Repeat this sequence a few times every day until your dog has it mastered. Then ask your dog to sit before mealtime, when leaving for walks, and during other situations where you’d like him calm and seated.
Step 2 : Come
This command can help keep a dog out of trouble, bringing him back to you if you lose grip on the leash or accidentally leave the front door open.
• Put a leash and collar on your dog.
• Go down to his level and say, “Come,” while gently pulling on the leash.
• When he gets to you, reward him with affection and a treat.
Once he’s mastered it with the leash, remove it — and practice the command in a safe, enclosed area.
Step 3 : Down
This can be one of the more difficult commands in dog obedience training. Why? Because the position is a submissive posture. You can help by keeping training positive and relaxed, particularly with fearful or anxious dogs.
• Find a particularly good smelling treat, and hold it in your closed fist.
• Hold your hand up to your dog’s snout. When he sniffs it, move your hand to the floor, so he follows.
• Then slide your hand along the ground in front of him to encourage his body to follow his head.
• Once he’s in the down position, say “Down,” give him the treat, and share affection.
Repeat it every day. If your dog tries to sit up or lunges toward your hand, say “No” and take your hand away. Don’t push him into a down position, and encourage every step your dog takes toward the right position. After all, he’s working hard to figure it out!

Bones are strong in compression as well as tension, so they are fit to anchor muscle ends.

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LOL I m doing the exact same question hahaha